Of course DSP is not new as it simply refers to Digital Signal Processing to achieve psychoacoustic effects. DSP is merely a generally descriptive term, but it is in its specific application, and the technology behind it, that the differences lie. A simple primitive telescope bears a relation to a modern day optica telescope, but technology has radically transformed the modern telescope's capabilities.
In the case of the Yarra 3DX, each driver has its own DSP chip, and in addition to this and other hardware features it's all about the algorithms imployed in Yarra's DSP implementation. As far as I know, no other DSP implementation has had the ability to steer three discrete channels to three people. The Yamaha My Beam does not do that. And to achieve this purely using DSP, and no physical steering is pretty amazing. Also, I find some of the listener's reaction to the device pretty compelling, and wish I had known about the LA Audio Show demo as I am in LA.
Regarding driver size, I agree that larger is better, which is why I speculated about other designs further down the road that could apply this technology to more capable hardware.
By the way, before Yamaha introduced their bean steering sound projector, it was commercialized by Duran Audio with their DDC (Digital Directivity Control). There were earlier examples of beam steering, (It was first demonstrated by an English audio engineer) but without DSP there were serious limitations to the technology.
Last edited by taichi4; 09-18-2017 at 05:23 PM.